We have the best, we have the worst, but it just wouldnt be realistic if there whernt events that make you say "Why are you even bothering a great emporer like myself with this?" To me these are: Road Washed away. I can see the potential danger but I always have workers build tonnes of roads once their important work is done, never hurt me yet One Time culture bonus. Its only happened in already developed citys and the max bonus I've seen is +450, even when I play for cultural vicotry this saves 0-1 turns. +1 to anything with less than 100 turns left. 5 turns left, your library now produces +1 Science, Yay!